Definition
Letter spacing, also known as tracking, refers to the horizontal space between individual characters. In typography, it is a crucial tool for fine-tuning legibility and creating visual balance across a line of text.
Like People Standing Shoulder to Shoulder
When people pack into a crowded subway platform with zero personal space, it feels suffocating. If they stand too far apart, you cannot even tell whether they are waiting in the same line. Letters work the same way. Letter spacing provides the breathing room that keeps characters comfortably aligned.
If letters sit too close together, their strokes collide and blur, making words hard to decipher at a glance. If they drift too far apart, words lose their cohesive shape and scatter into separate letters, slowing down your reading. To make text effortless to read, finding the balance of white space is essential.
Every character across different scripts has unique curves, angles, and internal gaps. Fine-tuning the spacing between them turns a scattered string of glyphs into a steady, harmonious rhythm that the eyes can easily glide across.
How Spacing Changes from Headlines to Body Text
The golden rule of letter spacing is to adjust it based on font size. When setting large text—such as huge billboard headlines or presentation titles—it helps to tighten the spacing slightly.
Most fonts have default spacing designed for standard body copy. When blown up to headline size, those built-in gaps look noticeably loose and disconnected. Tightening the tracking tightens the visual unity of the headline, giving it a crisp, punchy presence that catches the eye immediately.
Conversely, tiny text like photo captions, footnotes, or fine print benefits from wider spacing. When letters shrink, neighboring characters easily bleed into each other. Adding extra space between small letters keeps each character distinct and crisp, making tiny text dramatically easier to read.
A Closer Look: Tracking vs. Kerning
What word processors and everyday design tools simply label 'letter spacing' actually involves two distinct techniques: tracking and kerning.
Specifically, tracking applies uniform spacing across an entire word, sentence, or paragraph. When you move a slider in design software to tweak overall spacing to '+10%' or '-5%', you are adjusting tracking.
Kerning, on the other hand, fine-tunes the awkward gap between a specific pair of letters. For instance, when capital letters 'A' and 'V' sit next to each other, their diagonal strokes leave an unusually wide empty pocket. Digital fonts include built-in kerning pairs that nudge specific letter combinations closer or farther, ensuring the flow of text looks smooth and even.
Common misconceptions
A font's default letter spacing is already perfect for every text size.
Default spacing is typically optimized for medium-sized body text. Headlines look tighter and more cohesive with slightly reduced spacing, while tiny footnotes become much more legible when slightly expanded.
Where you meet it
Tightening the tracking slightly on large, bold slide titles to create a strong, cohesive punch.
Opening up the letter spacing on small mobile disclaimers and caption text so tiny characters do not blur together.
In one sentence
Letter spacing controls the breathing room between characters; adjusting it for text size and letter shape drastically improves readability and design polish.